30724738 has 8 divisors (see below), whose sum is σ = 50276880. Its totient is φ = 13965780.

The previous prime is 30724723. The next prime is 30724741. The reversal of 30724738 is 83742703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×30724738³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698268 + ... + 698311.

It is an arithmetic number, because the mean of its divisors is an integer number (6284610).

Almost surely, 2^30724738 is an apocalyptic number.

30724738 is a deficient number, since it is larger than the sum of its proper divisors (19552142).

30724738 is a wasteful number, since it uses less digits than its factorization.

30724738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396592.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 30724738 is about 5542.9899873624. The cubic root of 30724738 is about 313.2055117183.

The spelling of 30724738 in words is "thirty million, seven hundred twenty-four thousand, seven hundred thirty-eight".